Great Duo Symphonic

Lafayette Radio & TV Corp; New York (NY)

Data
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  • Year
  • 1930
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 66658
    • alternative name: Wholesale Radio

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 8
  • Main principle
  • TRF without regeneration; 2 AF stage(s); Screengrid 1926-1935
  • Tuned circuits
  • 4 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / 110 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Great Duo Symphonic - Lafayette Radio & TV Corp; New
  • Notes
  • Rider's Perpetual volume 1 shows this Lafayette "Great Duo Symphonic" (GR.D.S.) under "Wholesale" instead of "Lafayette". The Lafayette model "Great Duo Symphonic" has one dial (primary tuning control knob) with a 4 gang tuning condenser. The two CX345 or 245 power output tubes form a push-pull. See also "Duo Symphonic 1931", "Duo Symphonic (1930)" with 9 tubes and "Duo-Symphonic Junior 1931" with 7 tubes. The question stays why it is called "Great" if it has only 8 tubes instead of 9 - and if it is really correct if it is not found in a catalog.

    We have not found this model in a catalog so far and therefore we link here for the description of the different catalogs.
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

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